I have been developing a project now for 6 yrs, when i started i did not a thing about vb or programming (a little lotus123). I have only learned of the stuff i needed to make my project, most of vb i don't have a clue. My project keeps growing containing flexigrids, api's, rtf files, pdw etc. I have stayed away from controls i don't need or understand. Seems i always run into a problem with pdw with new stuff. I have stayed away from usercontrols i have seen on Planet because i do not understand them.

Here is my question:
I have found a usercontrol (on Planet) i would love to add to my program, but if it's to much hassle i can do without it. Do usercontrols installed with pdw go in the system directory and get registered?
Is ther any pitfalls with user controls? Any drawbacks ? Any input would be appreciated.
Thank you